Shimano Ultegra BR-R8100 Rim Brake Rear Bikesportz which is a record-weight for

which is a record-weight for a high-end bottle cage

Lower rolling resistance and increased comfort compared to traditional clincher setups

its integrated USB plugs directly into USB ports

Wireless / Wired Di2

Bright & punchy 100 lumen output

Shimano Ultegra BR-R8100 Rim Brake Rear Bikesportz which is a record-weight forShimano Br R8100 Front Brake Ultegra Features Ultegra components offer an ideal balance of light weight and stiffness, making them perfect for both enthusiast and competitive riders. Dual pivot caliper brake with Super SLR EV design for quick linear response, increased rigidity, and improved braking power. Must be used in conjunction with Super SLR levers for correct leverage ratio. Enhanced brake arch proportions provide a quicker linear response and